get rid of unsupported Signal class

maestro-cli/src/main/java/maestro/cli/session/MaestroSessionManager.kt

@@ -34,8 +34,6 @@ import maestro.debuglog.IOSDriverLogger
 import maestro.drivers.AndroidDriver
 import maestro.drivers.IOSDriver
 import org.slf4j.LoggerFactory
-import sun.misc.Signal
-import sun.misc.SignalHandler
 import util.XCRunnerCLIUtils
 import xcuitest.XCTestClient
 import xcuitest.XCTestDriverClient
@@ -44,7 +42,6 @@ import java.util.UUID
 import java.util.concurrent.Executors
 import java.util.concurrent.TimeUnit
 import kotlin.concurrent.thread
-import kotlin.system.exitProcess
 
 object MaestroSessionManager {
     private const val defaultHost = "localhost"
@@ -101,7 +98,6 @@ object MaestroSessionManager {
                 session.close()
             }
         })
-        Signal.handle(CustomSignalHandler.suspendSignal, CustomSignalHandler())
 
         return block(session)
     }
@@ -354,16 +350,4 @@ object MaestroSessionManager {
             maestro.close()
         }
     }
-
-    private class CustomSignalHandler() : SignalHandler {
-        override fun handle(signal: Signal) {
-            when (signal) {
-                suspendSignal -> exitProcess(0)
-            }
-        }
-
-        companion object {
-            val suspendSignal = Signal("TSTP")
-        }
-    }
 }